load-based speed control and gear-down protection - Cummins ...

LOAD-BASED SPEED CONTROL
AND GEAR-DOWN PROTECTION

LOAD-BASED SPEED CONTROL.
Every MPG.
If you’re looking for an engine that gets every ounce of
energy out of every drop of diesel fuel, you’re looking
for a Cummins. No other engine in its class has the
sophisticated electronic controls to help you achieve
the best possible fuel economy, on every trip and with
every driver. Only Cummins has the combination of
Load-Based Speed Control (LBSC) and Gear-Down
Protection (GDP), available on every ISX and ISM engine.
Better Fuel Economy, Every Trip.
Of all the fuel-saving devices that are available for
trucks today, none is more efficient or effective than
the person behind the wheel. The difference between
inexperienced and expert drivers is as much as 30%!
That’s thousands of dollars you can save, every year.
Cummins patented Load-Based Speed Control can
help your drivers achieve mpg targets.
Under low or intermediate power demands, LBSC
gives your driver a performance incentive to upshift
earlier in the rpm range. It “cues” the driver at the
exact point where shifting is optimized, which will
help to lower average engine operating speeds.
Engines that consistently run at a lower rpm get
higher fuel economy. They also run quieter and
have a longer life-to-overhaul.
The Power You Need,
When You Need It.
Load-Based Speed Control is integrated into your
engine’s Electronic Control Module (ECM), giving
drivers the power they need to climb hills and pass
slower-moving traffic while still providing exceptional
fuel economy in every other driving situation.
LBSC senses how much load your engine is pulling,
and adjusts the engine rpm that are available (in all but
the top two gears). For example: on the ISX engine,
on a fully loaded run up a grade, it will increase the
engine rpm limit to 2000 rpm (from the traditional
1800 rpm) so drivers can utilize the full strength of
the engine to get up to speed.

When Does LBSC Limit Engine Speed?
Only when all four of the following operating
conditions are met:
■ On a road grade of 2% or less
■ When gross combined weight is
80,000 pounds or less
■ When the truck is in an appropriate
transmission gear ratio
■ When the transmission is in gear
When Does LBSC Allow Maximum
Engine Speed?
Load-Based Speed Control gives your drivers full
engine performance when any one of the following
driving conditions exist:
■ In the top two gears (speed may be limited
by gear-down protection or maximum cruise
control/road speed governor settings)
■ During gear changes to ensure drivetrain
synchronization
■ In the Automatic or Drive mode of automated
manual transmissions
Gear-Down Protection.
Gear-Down Protection promotes increased fuel
economy by encouraging the driver to operate
as effectively as possible in top gear, where fuel
consumption is lower. It does so by limiting vehicle
speed one gear down. This only happens when
engine sensors read that the engine is operating
in a “light” load mode. Under light loads, when
downshifting would be unnecessary, Gear-Down
Protection can be set to limit vehicle speed very
noticeably, thereby providing the operator with a
strong incentive to remain in top gear.
When lugging uphill or pulling heavy loads, Gear-Down
Protection allows access to the full operating range of
the engine in all gears. Therefore, under heavy load,
the operator can accelerate up to heavy-load vehicle
speed in any gear. This allows the vehicle to perform
well under heavy loads, but still encourages the use
of the most efficient gear.
Getting Every MPG.
For more helpful advice on how you and your
drivers can achieve the best possible mpg
through vehicle specification, tire selection,
driving habits and more, please visit our web site
at www.everytime.cummins.com. To learn about
all the features and parameter settings available
with your Cummins ISX or ISM engine, and to create
a new spec that you can upload directly to your
truck’s ECM, visit www.powerspec.cummins.com.
Every Question, Answered.
If you would like additional information about Cummins
engines or options that can improve your fuel economy,
contact your Cummins dealer or distributor or call us
toll-free at 1-800-DIESELS (1-800-343-7357).

Cummins Inc.
Box 3005
Columbus, IN 47202-3005
U.S.A.
Phone: 1-800-DIESELS (1-800-343-7357)
Fax: 1-800-232-6393
Internet: www.everytime.cummins.com
Bulletin 4103852 Printed in U.S.A. 2/05
©2005 Cummins Inc.